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CVE-2026-50516

Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability

Published: Aug 11, 2026Updated: Aug 12, 2026 Sources: CVE List NVDCWE-306

Description

Missing authentication for critical function in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over a network.

In plain language

AI Act now

CVE-2026-50516 is a critical privilege-escalation flaw in Microsoft Azure Kubernetes Service that lets an outside attacker gain higher access over the network without needing a login; if you run AKS, you should treat this as urgent and ensure Microsoft’s fix has been applied.

Executive summary

CVE-2026-50516 is a privilege escalation issue (CWE-306) in Microsoft Azure Kubernetes Service where a missing security check/authorization for a network-accessible function allows an unauthenticated external attacker to gain higher-level access rights (no authentication or user interaction required).

If affected, business impact
Full cluster controlService disruptionData exposure riskRansomware risk

What to do now

  1. Check whether you are running Microsoft Azure Kubernetes Service (AKS) clusters (including any production clusters).
  2. Open Microsoft’s update guidance for CVE-2026-50516 and identify the fixed AKS/control-plane runtime state for your cluster.
  3. Apply the Microsoft-provided remediation (cluster/control-plane upgrade or the required AKS update path from the Microsoft update guide) as soon as possible.
  4. After applying, verify your AKS cluster is on the patched/updated state using the verification steps in the same Microsoft update guidance and confirm no failed upgrade steps remain.
Patch / advisory Some work to apply

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low

Weaknesses

Affected Products

and 1 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

4

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